lib/util/util.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Utility functions for Samba
   4    Copyright (C) Andrew Tridgell 1992-1999
   5    Copyright (C) Jelmer Vernooij 2005
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #ifndef _SAMBA_UTIL_H_
  22 #define _SAMBA_UTIL_H_
  23
  24 #include "lib/util/charset/charset.h"
  25 #include "lib/util/attr.h"
  26
  27 /* for TALLOC_CTX */
  28 #include <talloc.h>
  29
  30 /**
  31  * @file
  32  * @brief Helpful macros
  33  */
  34
  35 struct smbsrv_tcon;
  36
  37 extern const char *panic_action;
  38
  39 #include "lib/util/time.h"
  40 #include "lib/util/data_blob.h"
  41 #include "lib/util/xfile.h"
  42 #include "lib/util/byteorder.h"
  43 #include "lib/util/talloc_stack.h"
  44
  45 /**
  46  * assert macros
  47  */
  48 #ifdef DEVELOPER
  49 #define SMB_ASSERT(b) do { if (!(b)) { \
  50         DEBUG(0,("PANIC: assert failed at %s(%d): %s\n", \
  51                  __FILE__, __LINE__, #b)); smb_panic("assert failed: " #b); }} while(0)
  52 #else
  53 /* redefine the assert macro for non-developer builds */
  54 #define SMB_ASSERT(b) do { if (!(b)) { \
  55         DEBUG(0,("PANIC: assert failed at %s(%d): %s\n", \
  56             __FILE__, __LINE__, #b)); }} while (0)
  57 #endif
  58
  59 #ifndef ABS
  60 #define ABS(a) ((a)>0?(a):(-(a)))
  61 #endif
  62
  63 #include "lib/util/memory.h"
  64
  65 #include "lib/util/string_wrappers.h"
  66
  67 /**
  68  * Write backtrace to debug log
  69  */
  70 _PUBLIC_ void call_backtrace(void);
  71
  72 /**
  73  Something really nasty happened - panic !
  74 **/
  75 typedef void (*smb_panic_handler_t)(const char *why);
  76
  77 _PUBLIC_ void fault_configure(smb_panic_handler_t panic_handler);
  78 _PUBLIC_ void fault_setup(void);
  79 _PUBLIC_ void fault_setup_disable(void);
  80 _PUBLIC_ void dump_core_setup(const char *progname, const char *logfile);
  81 _PUBLIC_ void smb_panic(const char *reason);
  82
  83
  84 /**
  85   register a fault handler.
  86   Should only be called once in the execution of smbd.
  87 */
  88 _PUBLIC_ bool register_fault_handler(const char *name, void (*fault_handler)(int sig));
  89
  90 /* The following definitions come from lib/util/signal.c  */
  91
  92
  93 /**
  94  Block sigs.
  95 **/
  96 void BlockSignals(bool block, int signum);
  97
  98 /**
  99  Catch a signal. This should implement the following semantics:
 100
 101  1) The handler remains installed after being called.
 102  2) The signal should be blocked during handler execution.
 103 **/
 104 void (*CatchSignal(int signum,void (*handler)(int )))(int);
 105
 106 /**
 107  Ignore SIGCLD via whatever means is necessary for this OS.
 108 **/
 109 void CatchChild(void);
 110
 111 /**
 112  Catch SIGCLD but leave the child around so it's status can be reaped.
 113 **/
 114 void CatchChildLeaveStatus(void);
 115
 116 /* The following definitions come from lib/util/system.c  */
 117
 118 void *sys_memalign( size_t align, size_t size );
 119
 120 /**************************************************************************
 121 A wrapper for gethostbyname() that tries avoids looking up hostnames
 122 in the root domain, which can cause dial-on-demand links to come up for no
 123 apparent reason.
 124 ****************************************************************************/
 125 _PUBLIC_ struct hostent *sys_gethostbyname(const char *name);
 126 _PUBLIC_ struct in_addr sys_inet_makeaddr(int net, int host);
 127
 128 /**
 129  * Wrapper for fork used to invalid pid cache.
 130  **/
 131 _PUBLIC_ pid_t sys_fork(void);
 132
 133 /**
 134  * Wrapper for getpid. Ensures we only do a system call *once*.
 135  **/
 136 _PUBLIC_ pid_t sys_getpid(void);
 137
 138 _PUBLIC_ int sys_getpeereid( int s, uid_t *uid);
 139
 140 struct sockaddr;
 141
 142 _PUBLIC_ int sys_getnameinfo(const struct sockaddr *psa,
 143                              int salen,
 144                              char *host,
 145                              size_t hostlen,
 146                              char *service,
 147                              size_t servlen,
 148                              int flags);
 149 _PUBLIC_ int sys_connect(int fd, const struct sockaddr * addr);
 150
 151 /* The following definitions come from lib/util/genrand.c  */
 152 /**
 153  Copy any user given reseed data.
 154 **/
 155 _PUBLIC_ void set_rand_reseed_callback(void (*fn)(void *, int *), void *);
 156
 157 /**
 158  * Tell the random number generator it needs to reseed.
 159  */
 160 _PUBLIC_ void set_need_random_reseed(void);
 161
 162 /**
 163  Interface to the (hopefully) good crypto random number generator.
 164  Will use our internal PRNG if more than 40 bytes of random generation
 165  has been requested, otherwise tries to read from /dev/random
 166 **/
 167 _PUBLIC_ void generate_random_buffer(uint8_t *out, int len);
 168
 169 /**
 170  Interface to the (hopefully) good crypto random number generator.
 171  Will always use /dev/urandom if available.
 172 **/
 173 _PUBLIC_ void generate_secret_buffer(uint8_t *out, int len);
 174
 175 /**
 176   generate a single random uint32_t
 177 **/
 178 _PUBLIC_ uint32_t generate_random(void);
 179
 180 /**
 181   very basic password quality checker
 182 **/
 183 _PUBLIC_ bool check_password_quality(const char *s);
 184
 185 /**
 186  * Generate a random text password.
 187  */
 188 _PUBLIC_ char *generate_random_password(TALLOC_CTX *mem_ctx, size_t min, size_t max);
 189
 190 /**
 191  Use the random number generator to generate a random string.
 192 **/
 193 _PUBLIC_ char *generate_random_str_list(TALLOC_CTX *mem_ctx, size_t len, const char *list);
 194
 195 /**
 196  * Generate a random text string consisting of the specified length.
 197  * The returned string will be allocated.
 198  *
 199  * Characters used are: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+_-#.,
 200  */
 201 _PUBLIC_ char *generate_random_str(TALLOC_CTX *mem_ctx, size_t len);
 202
 203 /**
 204  * Generate an array of unique text strings all of the same length.
 205  * The returned strings will be allocated.
 206  * Returns NULL if the number of unique combinations cannot be created.
 207  *
 208  * Characters used are: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+_-#.,
 209  */
 210 _PUBLIC_ char** generate_unique_strs(TALLOC_CTX *mem_ctx, size_t len,
 211                                          uint32_t num);
 212
 213 /* The following definitions come from lib/util/dprintf.c  */
 214 #if _SAMBA_BUILD_ == 4
 215
 216 _PUBLIC_ void d_set_iconv(smb_iconv_t);
 217 _PUBLIC_ int d_vfprintf(FILE *f, const char *format, va_list ap) PRINTF_ATTRIBUTE(2,0);
 218 _PUBLIC_ int d_fprintf(FILE *f, const char *format, ...) PRINTF_ATTRIBUTE(2,3);
 219 _PUBLIC_ int d_printf(const char *format, ...) PRINTF_ATTRIBUTE(1,2);
 220 _PUBLIC_ void display_set_stderr(void);
 221 #endif
 222
 223 /* The following definitions come from lib/util/util_str.c  */
 224
 225 bool next_token_talloc(TALLOC_CTX *ctx,
 226                         const char **ptr,
 227                         char **pp_buff,
 228                         const char *sep);
 229
 230 /**
 231  * Get the next token from a string, return false if none found.  Handles
 232  * double-quotes.  This version does not trim leading separator characters
 233  * before looking for a token.
 234  */
 235 bool next_token_no_ltrim_talloc(TALLOC_CTX *ctx,
 236                         const char **ptr,
 237                         char **pp_buff,
 238                         const char *sep);
 239
 240
 241 /**
 242  Trim the specified elements off the front and back of a string.
 243 **/
 244 _PUBLIC_ bool trim_string(char *s, const char *front, const char *back);
 245
 246 /**
 247  Find the number of 'c' chars in a string
 248 **/
 249 _PUBLIC_ _PURE_ size_t count_chars(const char *s, char c);
 250
 251 /**
 252  Routine to get hex characters and turn them into a 16 byte array.
 253  the array can be variable length, and any non-hex-numeric
 254  characters are skipped.  "0xnn" or "0Xnn" is specially catered
 255  for.
 256
 257  valid examples: "0A5D15"; "0x15, 0x49, 0xa2"; "59\ta9\te3\n"
 258
 259
 260 **/
 261 _PUBLIC_ size_t strhex_to_str(char *p, size_t p_len, const char *strhex, size_t strhex_len);
 262
 263 /**
 264  * Parse a hex string and return a data blob.
 265  */
 266 _PUBLIC_ _PURE_ DATA_BLOB strhex_to_data_blob(TALLOC_CTX *mem_ctx, const char *strhex) ;
 267
 268 /**
 269  * Routine to print a buffer as HEX digits, into an allocated string.
 270  */
 271 _PUBLIC_ void hex_encode(const unsigned char *buff_in, size_t len, char **out_hex_buffer);
 272
 273 /**
 274  * talloc version of hex_encode()
 275  */
 276 _PUBLIC_ char *hex_encode_talloc(TALLOC_CTX *mem_ctx, const unsigned char *buff_in, size_t len);
 277
 278 /**
 279  Substitute a string for a pattern in another string. Make sure there is
 280  enough room!
 281
 282  This routine looks for pattern in s and replaces it with
 283  insert. It may do multiple replacements.
 284
 285  Any of " ; ' $ or ` in the insert string are replaced with _
 286  if len==0 then the string cannot be extended. This is different from the old
 287  use of len==0 which was for no length checks to be done.
 288 **/
 289 _PUBLIC_ void string_sub(char *s,const char *pattern, const char *insert, size_t len);
 290
 291 _PUBLIC_ void string_sub_once(char *s, const char *pattern,
 292                               const char *insert, size_t len);
 293
 294 _PUBLIC_ char *string_sub_talloc(TALLOC_CTX *mem_ctx, const char *s,
 295                                 const char *pattern, const char *insert);
 296
 297 /**
 298  Similar to string_sub() but allows for any character to be substituted.
 299  Use with caution!
 300  if len==0 then the string cannot be extended. This is different from the old
 301  use of len==0 which was for no length checks to be done.
 302 **/
 303 _PUBLIC_ void all_string_sub(char *s,const char *pattern,const char *insert, size_t len);
 304
 305 /**
 306  Unescape a URL encoded string, in place.
 307 **/
 308 _PUBLIC_ void rfc1738_unescape(char *buf);
 309
 310
 311 /**
 312  * rfc1738_escape
 313  * Returns a static buffer that contains the RFC
 314  * 1738 compliant, escaped version of the given url. (escapes unsafe and % characters)
 315  **/
 316 _PUBLIC_ char *rfc1738_escape(TALLOC_CTX *mem_ctx, const char *url);
 317
 318 /**
 319  * rfc1738_escape_unescaped
 320  *
 321  * Returns a static buffer that contains
 322  * the RFC 1738 compliant, escaped version of the given url (escapes unsafe chars only)
 323  **/
 324 _PUBLIC_ char *rfc1738_escape_unescaped(TALLOC_CTX *mem_ctx, const char *url);
 325
 326 /**
 327  * rfc1738_escape_part
 328  * Returns a static buffer that contains the RFC
 329  * 1738 compliant, escaped version of the given url segment. (escapes
 330  * unsafe, reserved and % chars) It would mangle the :// in http://,
 331  * and mangle paths (because of /).
 332  **/
 333 _PUBLIC_ char *rfc1738_escape_part(TALLOC_CTX *mem_ctx, const char *url);
 334
 335 /**
 336   format a string into length-prefixed dotted domain format, as used in NBT
 337   and in some ADS structures
 338 **/
 339 _PUBLIC_ const char *str_format_nbt_domain(TALLOC_CTX *mem_ctx, const char *s);
 340
 341 /**
 342  * Add a string to an array of strings.
 343  *
 344  * num should be a pointer to an integer that holds the current
 345  * number of elements in strings. It will be updated by this function.
 346  */
 347 _PUBLIC_ bool add_string_to_array(TALLOC_CTX *mem_ctx,
 348                          const char *str, const char ***strings, int *num);
 349
 350 /**
 351   varient of strcmp() that handles NULL ptrs
 352 **/
 353 _PUBLIC_ int strcmp_safe(const char *s1, const char *s2);
 354
 355 /**
 356 return the number of bytes occupied by a buffer in ASCII format
 357 the result includes the null termination
 358 limited by 'n' bytes
 359 **/
 360 _PUBLIC_ size_t ascii_len_n(const char *src, size_t n);
 361
 362 /**
 363  Set a boolean variable from the text value stored in the passed string.
 364  Returns true in success, false if the passed string does not correctly
 365  represent a boolean.
 366 **/
 367 _PUBLIC_ bool set_boolean(const char *boolean_string, bool *boolean);
 368
 369 /**
 370  * Parse a string containing a boolean value.
 371  *
 372  * val will be set to the read value.
 373  *
 374  * @retval true if a boolean value was parsed, false otherwise.
 375  */
 376 _PUBLIC_ bool conv_str_bool(const char * str, bool * val);
 377
 378 /**
 379  * Convert a size specification like 16K into an integral number of bytes.
 380  **/
 381 _PUBLIC_ bool conv_str_size_error(const char * str, uint64_t * val);
 382
 383 /**
 384  * Parse a uint64_t value from a string
 385  *
 386  * val will be set to the value read.
 387  *
 388  * @retval true if parsing was successful, false otherwise
 389  */
 390 _PUBLIC_ bool conv_str_u64(const char * str, uint64_t * val);
 391
 392 /**
 393 return the number of bytes occupied by a buffer in CH_UTF16 format
 394 the result includes the null termination
 395 **/
 396 _PUBLIC_ size_t utf16_len(const void *buf);
 397
 398 /**
 399 return the number of bytes occupied by a buffer in CH_UTF16 format
 400 the result includes the null termination
 401 limited by 'n' bytes
 402 **/
 403 _PUBLIC_ size_t utf16_len_n(const void *src, size_t n);
 404 _PUBLIC_ size_t ucs2_align(const void *base_ptr, const void *p, int flags);
 405
 406 /**
 407 Do a case-insensitive, whitespace-ignoring string compare.
 408 **/
 409 _PUBLIC_ int strwicmp(const char *psz1, const char *psz2);
 410
 411 /**
 412  String replace.
 413 **/
 414 _PUBLIC_ void string_replace(char *s, char oldc, char newc);
 415
 416 /**
 417  Base64 decode a string, place into a data blob.  Caller to data_blob_free() the result.
 418 **/
 419 _PUBLIC_ DATA_BLOB base64_decode_data_blob(const char *s);
 420 /**
 421  Base64 decode a string, inplace
 422 **/
 423 _PUBLIC_ void base64_decode_inplace(char *s);
 424 /**
 425  Base64 encode a binary data blob into a string
 426 **/
 427 _PUBLIC_ char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data);
 428
 429 /**
 430  * Compare 2 strings.
 431  *
 432  * @note The comparison is case-insensitive.
 433  **/
 434 _PUBLIC_ bool strequal(const char *s1, const char *s2);
 435
 436 /* The following definitions come from lib/util/util_strlist.c  */
 437
 438 /* separators for lists */
 439 #ifndef LIST_SEP
 440 #define LIST_SEP " \t,\n\r"
 441 #endif
 442
 443 /**
 444   build an empty (only NULL terminated) list of strings (for expansion with str_list_add() etc)
 445 */
 446 _PUBLIC_ char **str_list_make_empty(TALLOC_CTX *mem_ctx);
 447
 448 /**
 449   place the only element 'entry' into a new, NULL terminated string list
 450 */
 451 _PUBLIC_ char **str_list_make_single(TALLOC_CTX *mem_ctx,
 452         const char *entry);
 453
 454 /**
 455   build a null terminated list of strings from a input string and a
 456   separator list. The separator list must contain characters less than
 457   or equal to 0x2f for this to work correctly on multi-byte strings
 458 */
 459 _PUBLIC_ char **str_list_make(TALLOC_CTX *mem_ctx, const char *string,
 460         const char *sep);
 461
 462 /**
 463  * build a null terminated list of strings from an argv-like input string
 464  * Entries are separated by spaces and can be enclosed by quotes.
 465  * Does NOT support escaping
 466  */
 467 _PUBLIC_ char **str_list_make_shell(TALLOC_CTX *mem_ctx, const char *string, const char *sep);
 468
 469 /**
 470  * join a list back to one string
 471  */
 472 _PUBLIC_ char *str_list_join(TALLOC_CTX *mem_ctx, const char **list, char separator);
 473
 474 /** join a list back to one (shell-like) string; entries
 475  * separated by spaces, using quotes where necessary */
 476 _PUBLIC_ char *str_list_join_shell(TALLOC_CTX *mem_ctx, const char **list, char sep);
 477
 478 /**
 479   return the number of elements in a string list
 480 */
 481 _PUBLIC_ size_t str_list_length(const char * const *list);
 482
 483 /**
 484   copy a string list
 485 */
 486 _PUBLIC_ char **str_list_copy(TALLOC_CTX *mem_ctx, const char **list);
 487
 488 /**
 489    Return true if all the elements of the list match exactly.
 490  */
 491 _PUBLIC_ bool str_list_equal(const char * const *list1, const char * const *list2);
 492
 493 /**
 494   add an entry to a string list
 495 */
 496 _PUBLIC_ const char **str_list_add(const char **list, const char *s);
 497
 498 /**
 499   remove an entry from a string list
 500 */
 501 _PUBLIC_ void str_list_remove(const char **list, const char *s);
 502
 503 /**
 504   return true if a string is in a list
 505 */
 506 _PUBLIC_ bool str_list_check(const char **list, const char *s);
 507
 508 /**
 509   return true if a string is in a list, case insensitively
 510 */
 511 _PUBLIC_ bool str_list_check_ci(const char **list, const char *s);
 512 /**
 513   append one list to another - expanding list1
 514 */
 515 _PUBLIC_ const char **str_list_append(const char **list1,
 516         const char * const *list2);
 517
 518 /**
 519  remove duplicate elements from a list
 520 */
 521 _PUBLIC_ const char **str_list_unique(const char **list);
 522
 523 /*
 524   very useful when debugging complex list related code
 525  */
 526 _PUBLIC_ void str_list_show(const char **list);
 527
 528
 529 /**
 530   append one list to another - expanding list1
 531   this assumes the elements of list2 are const pointers, so we can re-use them
 532 */
 533 _PUBLIC_ const char **str_list_append_const(const char **list1,
 534                                             const char **list2);
 535
 536 /**
 537   add an entry to a string list
 538   this assumes s will not change
 539 */
 540 _PUBLIC_ const char **str_list_add_const(const char **list, const char *s);
 541
 542 /**
 543   copy a string list
 544   this assumes list will not change
 545 */
 546 _PUBLIC_ const char **str_list_copy_const(TALLOC_CTX *mem_ctx,
 547                                           const char **list);
 548
 549 /**
 550  * Needed for making an "unconst" list "const"
 551  */
 552 _PUBLIC_ const char **const_str_list(char **list);
 553
 554
 555 /* The following definitions come from lib/util/util_file.c  */
 556
 557
 558 /**
 559 read a line from a file with possible \ continuation chars.
 560 Blanks at the start or end of a line are stripped.
 561 The string will be allocated if s2 is NULL
 562 **/
 563 _PUBLIC_ char *fgets_slash(char *s2,int maxlen,XFILE *f);
 564
 565 /**
 566  * Read one line (data until next newline or eof) and allocate it
 567  */
 568 _PUBLIC_ char *afdgets(int fd, TALLOC_CTX *mem_ctx, size_t hint);
 569
 570 /**
 571 load a file into memory from a fd.
 572 **/
 573 _PUBLIC_ char *fd_load(int fd, size_t *size, size_t maxsize, TALLOC_CTX *mem_ctx);
 574
 575
 576 char **file_lines_parse(char *p, size_t size, int *numlines, TALLOC_CTX *mem_ctx);
 577
 578 /**
 579 load a file into memory
 580 **/
 581 _PUBLIC_ char *file_load(const char *fname, size_t *size, size_t maxsize, TALLOC_CTX *mem_ctx);
 582
 583 /**
 584 mmap (if possible) or read a file
 585 **/
 586 _PUBLIC_ void *map_file(const char *fname, size_t size);
 587
 588 /**
 589 load a file into memory and return an array of pointers to lines in the file
 590 must be freed with talloc_free().
 591 **/
 592 _PUBLIC_ char **file_lines_load(const char *fname, int *numlines, size_t maxsize, TALLOC_CTX *mem_ctx);
 593
 594 /**
 595 load a fd into memory and return an array of pointers to lines in the file
 596 must be freed with talloc_free(). If convert is true calls unix_to_dos on
 597 the list.
 598 **/
 599 _PUBLIC_ char **fd_lines_load(int fd, int *numlines, size_t maxsize, TALLOC_CTX *mem_ctx);
 600
 601 /**
 602 take a list of lines and modify them to produce a list where \ continues
 603 a line
 604 **/
 605 _PUBLIC_ void file_lines_slashcont(char **lines);
 606
 607 /**
 608   save a lump of data into a file. Mostly used for debugging
 609 */
 610 _PUBLIC_ bool file_save(const char *fname, const void *packet, size_t length);
 611 _PUBLIC_ int vfdprintf(int fd, const char *format, va_list ap) PRINTF_ATTRIBUTE(2,0);
 612 _PUBLIC_ int fdprintf(int fd, const char *format, ...) PRINTF_ATTRIBUTE(2,3);
 613 _PUBLIC_ bool large_file_support(const char *path);
 614
 615 /*
 616   compare two files, return true if the two files have the same content
 617  */
 618 bool file_compare(const char *path1, const char *path2);
 619
 620 /* The following definitions come from lib/util/util.c  */
 621
 622
 623 /**
 624  Find a suitable temporary directory. The result should be copied immediately
 625  as it may be overwritten by a subsequent call.
 626 **/
 627 _PUBLIC_ const char *tmpdir(void);
 628
 629 /**
 630  Check if a file exists - call vfs_file_exist for samba files.
 631 **/
 632 _PUBLIC_ bool file_exist(const char *fname);
 633
 634 /**
 635  Check a files mod time.
 636 **/
 637 _PUBLIC_ time_t file_modtime(const char *fname);
 638
 639 /**
 640  Check if a directory exists.
 641 **/
 642 _PUBLIC_ bool directory_exist(const char *dname);
 643
 644 /**
 645  * Try to create the specified directory if it didn't exist.
 646  *
 647  * @retval true if the directory already existed and has the right permissions
 648  * or was successfully created.
 649  */
 650 _PUBLIC_ bool directory_create_or_exist(const char *dname, uid_t uid,
 651                                mode_t dir_perms);
 652
 653 /**
 654  Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
 655  else
 656   if SYSV use O_NDELAY
 657   if BSD use FNDELAY
 658 **/
 659 _PUBLIC_ int set_blocking(int fd, bool set);
 660
 661 /**
 662  Sleep for a specified number of milliseconds.
 663 **/
 664 _PUBLIC_ void smb_msleep(unsigned int t);
 665
 666 /**
 667  Get my own name, return in talloc'ed storage.
 668 **/
 669 _PUBLIC_ char* get_myname(TALLOC_CTX *mem_ctx);
 670
 671 /**
 672  Check if a process exists. Does this work on all unixes?
 673 **/
 674 _PUBLIC_ bool process_exists_by_pid(pid_t pid);
 675
 676 /**
 677  Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
 678  is dealt with in posix.c
 679 **/
 680 _PUBLIC_ bool fcntl_lock(int fd, int op, off_t offset, off_t count, int type);
 681
 682 /**
 683  * Write dump of binary data to a callback
 684  */
 685 void dump_data_cb(const uint8_t *buf, int len,
 686                   bool omit_zero_bytes,
 687                   void (*cb)(const char *buf, void *private_data),
 688                   void *private_data);
 689
 690 /**
 691  * Write dump of binary data to the log file.
 692  *
 693  * The data is only written if the log level is at least level.
 694  */
 695 _PUBLIC_ void dump_data(int level, const uint8_t *buf,int len);
 696
 697 /**
 698  * Write dump of binary data to the log file.
 699  *
 700  * The data is only written if the log level is at least level.
 701  * 16 zero bytes in a row are omitted
 702  */
 703 _PUBLIC_ void dump_data_skip_zeros(int level, const uint8_t *buf, int len);
 704
 705 /**
 706  malloc that aborts with smb_panic on fail or zero size.
 707 **/
 708 _PUBLIC_ void *smb_xmalloc(size_t size);
 709
 710 /**
 711  Memdup with smb_panic on fail.
 712 **/
 713 _PUBLIC_ void *smb_xmemdup(const void *p, size_t size);
 714
 715 /**
 716  strdup that aborts on malloc fail.
 717 **/
 718 _PUBLIC_ char *smb_xstrdup(const char *s);
 719
 720 char *smb_xstrndup(const char *s, size_t n);
 721
 722 /**
 723  Like strdup but for memory.
 724 **/
 725 _PUBLIC_ void *memdup(const void *p, size_t size);
 726
 727 /**
 728  * Write a password to the log file.
 729  *
 730  * @note Only actually does something if DEBUG_PASSWORD was defined during
 731  * compile-time.
 732  */
 733 _PUBLIC_ void dump_data_pw(const char *msg, const uint8_t * data, size_t len);
 734
 735 /**
 736  * see if a range of memory is all zero. A NULL pointer is considered
 737  * to be all zero
 738  */
 739 _PUBLIC_ bool all_zero(const uint8_t *ptr, size_t size);
 740
 741 /**
 742   realloc an array, checking for integer overflow in the array size
 743 */
 744 _PUBLIC_ void *realloc_array(void *ptr, size_t el_size, unsigned count, bool free_on_fail);
 745
 746 void *malloc_array(size_t el_size, unsigned int count);
 747
 748 /* The following definitions come from lib/util/fsusage.c  */
 749
 750
 751 /**
 752  * Retrieve amount of free disk space.
 753  * this does all of the system specific guff to get the free disk space.
 754  * It is derived from code in the GNU fileutils package, but has been
 755  * considerably mangled for use here
 756  *
 757  * results are returned in *dfree and *dsize, in 512 byte units
 758 */
 759 _PUBLIC_ int sys_fsusage(const char *path, uint64_t *dfree, uint64_t *dsize);
 760
 761 /* The following definitions come from lib/util/ms_fnmatch.c  */
 762
 763
 764 /**
 765  * @file
 766  * @brief MS-style Filename matching
 767  */
 768
 769 #if _SAMBA_BUILD_ == 4
 770 /* protocol types. It assumes that higher protocols include lower protocols
 771    as subsets. FIXME: Move to one of the smb-specific headers */
 772 enum protocol_types {
 773         PROTOCOL_NONE,
 774         PROTOCOL_CORE,
 775         PROTOCOL_COREPLUS,
 776         PROTOCOL_LANMAN1,
 777         PROTOCOL_LANMAN2,
 778         PROTOCOL_NT1,
 779         PROTOCOL_SMB2
 780 };
 781
 782 #endif
 783
 784 int ms_fnmatch_protocol(const char *pattern, const char *string, int protocol);
 785
 786 /** a generic fnmatch function - uses for non-CIFS pattern matching */
 787 int gen_fnmatch(const char *pattern, const char *string);
 788
 789 /* The following definitions come from lib/util/idtree.c  */
 790
 791
 792 /**
 793   initialise a idr tree. The context return value must be passed to
 794   all subsequent idr calls. To destroy the idr tree use talloc_free()
 795   on this context
 796  */
 797 _PUBLIC_ struct idr_context *idr_init(TALLOC_CTX *mem_ctx);
 798
 799 /**
 800   allocate the next available id, and assign 'ptr' into its slot.
 801   you can retrieve later this pointer using idr_find()
 802 */
 803 _PUBLIC_ int idr_get_new(struct idr_context *idp, void *ptr, int limit);
 804
 805 /**
 806    allocate a new id, giving the first available value greater than or
 807    equal to the given starting id
 808 */
 809 _PUBLIC_ int idr_get_new_above(struct idr_context *idp, void *ptr, int starting_id, int limit);
 810
 811 /**
 812   allocate a new id randomly in the given range
 813 */
 814 _PUBLIC_ int idr_get_new_random(struct idr_context *idp, void *ptr, int limit);
 815
 816 /**
 817   find a pointer value previously set with idr_get_new given an id
 818 */
 819 _PUBLIC_ void *idr_find(struct idr_context *idp, int id);
 820
 821 /**
 822   remove an id from the idr tree
 823 */
 824 _PUBLIC_ int idr_remove(struct idr_context *idp, int id);
 825
 826 /* The following definitions come from lib/util/become_daemon.c  */
 827
 828 /**
 829  Close the low 3 fd's and open dev/null in their place
 830 **/
 831 _PUBLIC_ void close_low_fds(bool stderr_too);
 832
 833 /**
 834  Become a daemon, discarding the controlling terminal.
 835 **/
 836 _PUBLIC_ void become_daemon(bool do_fork, bool no_process_group, bool log_stdout);
 837
 838 /**
 839  * Load a ini-style file.
 840  */
 841 bool pm_process( const char *fileName,
 842                  bool (*sfunc)(const char *, void *),
 843                  bool (*pfunc)(const char *, const char *, void *),
 844                                  void *userdata);
 845
 846 bool unmap_file(void *start, size_t size);
 847
 848 void print_asc(int level, const uint8_t *buf,int len);
 849 void print_asc_cb(const uint8_t *buf, int len,
 850                   void (*cb)(const char *buf, void *private_data),
 851                   void *private_data);
 852
 853 /**
 854  * Add an id to an array of ids.
 855  *
 856  * num should be a pointer to an integer that holds the current
 857  * number of elements in ids. It will be updated by this function.
 858  */
 859
 860 bool add_uid_to_array_unique(TALLOC_CTX *mem_ctx, uid_t uid,
 861                              uid_t **uids, uint32_t *num_uids);
 862 bool add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
 863                              gid_t **gids, uint32_t *num_gids);
 864
 865 /**
 866  * Allocate anonymous shared memory of the given size
 867  */
 868 void *anonymous_shared_allocate(size_t bufsz);
 869 void anonymous_shared_free(void *ptr);
 870
 871 /*
 872   run a command as a child process, with a timeout.
 873
 874   any stdout/stderr from the child will appear in the Samba logs with
 875   the specified log levels
 876
 877   If callback is set then the callback is called on completion
 878   with the return code from the command
 879  */
 880 struct tevent_context;
 881 struct tevent_req;
 882 struct tevent_req *samba_runcmd_send(TALLOC_CTX *mem_ctx,
 883                                      struct tevent_context *ev,
 884                                      struct timeval endtime,
 885                                      int stdout_log_level,
 886                                      int stderr_log_level,
 887                                      const char * const *argv0, ...);
 888 int samba_runcmd_recv(struct tevent_req *req, int *perrno);
 889
 890 #ifdef DEVELOPER
 891 void samba_start_debugger(void);
 892 #endif
 893
 894 /**
 895  * @brief Returns an absolute path to a file in the Samba modules directory.
 896  *
 897  * @param name File to find, relative to MODULESDIR.
 898  *
 899  * @retval Pointer to a string containing the full path.
 900  **/
 901 char *modules_path(TALLOC_CTX *mem_ctx, const char *name);
 902
 903 /**
 904  * @brief Returns an absolute path to a file in the Samba data directory.
 905  *
 906  * @param name File to find, relative to CODEPAGEDIR.
 907  *
 908  * @retval Pointer to a talloc'ed string containing the full path.
 909  **/
 910 char *data_path(TALLOC_CTX *mem_ctx, const char *name);
 911
 912 /**
 913  * @brief Returns the platform specific shared library extension.
 914  *
 915  * @retval Pointer to a const char * containing the extension.
 916  **/
 917 const char *shlib_ext(void);
 918
 919 struct server_id;
 920 char *server_id_str(TALLOC_CTX *mem_ctx, const struct server_id *id);
 921
 922 #endif /* _SAMBA_UTIL_H_ */